Michael Bublé and wife expecting baby boy

The 40-year-old singer has revealed he and the 28-year-old model, whom he married in 2011, are expecting a little brother for their two-year-old son Noah and he has already starting picking out bizarre names for the unborn tot.

Speaking on 'Entertainment Tonight Canada' on Wednesday, he said with a beaming smile: "It's a boy."

He added that he's keen to name the baby Thor or Spider-Man when he arrives but he admitted his suggestions haven't gone down too well with the blonde stunner.

The 'Home' hitmaker also admitted little Noah is the reason he and Luisana decided to try for another child.

He explained: "Noah's two and I already miss him when he was a baby. We love that part so much that how can we not want to have that again?"

Meanwhile, the loved-up pair announced they were expecting their second child together via a sweet video clip on Michael's Facebook page in July.

The clip, which featured a soundtrack of Britney Spears' song 'Oops I Did It Again', showed Noah point to his mother's stomach and say "baby" after Michael asks him "who's in there?"